public abstract class A {
    private String name;
    public static String schoolName;

    public A(){}
    public A(String name){
        this.name = name;
    }

    public abstract void run();

    public String getName(){
        return name;
    }

    public void setName(String name){
        this.name = name;
    }

}
class C extends a {
    @Override
    public void run() {

    }
}